Process of producing pinacones.



kusen, near Cologne, Germany,

posed by the form magnesium amalgam,

rase r rarrz HOFMANN AND nonnan innrinnttoir, or ntzennrnnn, AND near mnrsnitnuns;

OF LEVEBKUSEN, NEAR GGLUGNE, GER-MANY,

VORM. FRIEDE. BAYER 85 00., OF ELBERFELD, GERMANY, A COEBORATION F GER- MANY.

ZPFS'JQCESS PRODUCING PINACONES.

anaemic,

Specification of Letters Patent.

Patented 0ot.1:, 191a l lo Drawing. Original application filed February 28, ten, Serial No. 511,374. Divided and this-application filed June 1, 1911. Serial-2T0. teaser.

To all whom it may concern:

Be it known that we, FRITZ HorMAn'N and KONBAD DELBRtioK, residing at Elberteld, and KURT MEISENBURG, residing at Leverdoctors of philosophy, chemists, citizens of the German Empire, have invented new and useful improvements in Processes of Producing Pinacones, of which the following is a specification.

The present application is a divisional application from our application No. 611,374.

We have found that toluene can be substituted for the acetone of crystallization in the process for reducing acetone to pinacone with the aid of magnesium and mercuric chlorid. The use of an excess of acetone, partof which suiiers disagreeable changes the reaction, is thus rendered supertlw.

ous.

In order to illustrate the new process more fully the following example is given, the parts being by weight :-200 grams of a per cent. sublimatencetone solution are added to 100 grams of magnesium metal; to this violently reacting mixture, a mixture of 300 grams of acetone with 600 grams oi toluene is added and then 800 grains of toluene. When the reaction is complete, the organo-magnesium compound is decomaddition of 125 grams of water, the metallic precipitate consisting mainly of a mixture of mercury and magnesium oxid is removed by filtration and the pinacone is precipitated from the toluene v the addition of solution as its hydrate by 300 grams of water.

In the foregoing process the mercuric chlorid and metallic magnesium react to the latter reagent beingthus formed during the reac v tion. y

We claim Y Y 1 Process of producing a pinacone from a ltetone which comprises treating such ketone-with magnesium amalgam in the presence of toluene as a non reactive diluent.

Process of producing a pinacone from acetone which comprises treating acetone with rn agnesium amalgam in the presence of toluene as a non-reactive diluenu 3. Process of producing a pinacone from. a ketone which comprises treating tone with mercuric chlorid and metallic magnesium in the presence of toluene as a non-reactive diluent.

l. -Process of producing pinacone trorn acetone which comprises treating acetone with mercuric chlorid and metallic magne siuin in the presence of toluene as a non reactive diluent. v

5. Process of producing pinacone-trom acetone which consists in treating 2 molecules'or acetone with mercuric chlorid an 1 molecule of toluene as a non-reactivediluent, decoinpos ing the organic magnesium compound thus produced and finally-isolating the pinacone, substantially as described.

testimony whereoi we have hereunto set our hands in the presence of two subscribing Witnesses.

rnrra- HGFi/IANN. [n a nouns-tn nnnnntion. [n

KURT MEl'SENBURG. [n a] 'Witnesses Ann" ASSIGNORS E0 FARBENFABBIKEN such kc magnesium in the presence of 

